Protector mechanism for looms.



Patented Mar. l3, I900.

F. A. WHITMURE. PROTECTOR MECHANISM FOR LOOMS.

(Application filed Aug. 17, 1899.)

(No Model.).

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I glll UNITED STATES PATENT OFFICE.

FRED A. WHITMORE, OF I-IOPEDALE, MASSACHUSETTS, ASSIGNOR TO THE DRAPER COMPANY, OF SAME PLACE AND PORTLAND, MAINE.

PROTECTOR MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 645,411, dated March 13, 1900.

Application filed August 17, 1 8 9 9.

To all whom, it may concern.-

Be it known that I, FRED A. WHITMORE, of Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Protector Mechanism for Looms, of which the following description, in connection with the accompanying drawings, is a specification,

' like letters and numerals on the drawings representing like parts.

The usual protector mechanism on backbinder looms includes a shuttle-binder, a dag ger operatively connected therewith, and a frog-lift mounted on a sliding frog, the dagger engaging the frog-lift and moving the frog when the shuttle is improperly boxed. In many instances the engaging face of the froglift has been downwardly beveled, so that it is tilted when engaged by the dagger; but at the same time the point of the latter is depressed, and this has operated to force the binder-finger against the binder with heavy pressure.

In actual practice many shuttles are split or smashed when the protector mechanism operates, due to the heavy pressure exerted upon the binder, as hereinbefore set forth, the shuttle being caught between the tired side of the shuttle-box and the binder.

My present invention has for its object the production of novel means to reduce to a minimum this pressure upon the binder when the protector mechanism is operated, so that the shuttle will be subjected to no undue strain when it is improperly boxed.

Figure 1 is a top or plan View of a sufficient portion of a loomto be understood with one embodiment of my protector mechanism applied thereto. Fig. 2 is a left-hand side elevation and partial section thereof on the line so as, Fig. 1, showing the dagger and shuttle binder in two positions. Fig. 3 is a similar View, but showing the dagger in engagement with the frog-lift and the binder-finger retracted. Fig. at is a partial side elevation and section of a portion of a loom provided with usual protector mechanism, illustrating the pressure put upon the binder when said mechanism operates; and Fig. 5 is an enlarged perspective view of the frog-lift, showing its engaging face.

The loom-frame A, lay A breast-beam A Serial No. 727,476. (No modelJ shipper-levers, the front box-plate b of the shuttle-box, the back-binder B, the binderspring b protector-rod d, having rigidly seor usual construction, the frog having guideears for the froglift and an arm f to engage the knock-off lever 20.

Referring first to the usual protector mechanism, (shown in Fig. 4,) the frog-lift f is mounted in a socket f in the frog to tilt or rock about its lower front edge 3, the daggerengaging face 4 of the frog-lift being down wardly beveled, as shown, so that when the dagger engages therewith, as shown in Fig. 4, the frog-lift is tipped as far as the ears f will permit; but at the same time the tip or point of the dagger is depressed by the action of the bevel-face thereupon. The rod dis thus rocked to elevate the arm cl, and the upper end of the binder-finger d is forced against the binder with great pressure, so that a shuttle caught between the binder and the front box-plate b would in very many instances be split or smashed, particularly in the case of the light self-threading shuttles used in automatic looms, the shuttle-bodies being cut through from top to bottom to admit the passage of a filling-carrier therethrough.

Referring now more particularly to Fig. 3, I have shown the engaging face of the froglift f as transversely recessed or notched, as at 8, (see also Fig. 5,) to form a shoulder 9, located above the fulcrum or edge 10,0n which the frog-lift is rocked or tilted, the tip of the dagger when the shuttle is improperly positioned in the shuttle-box entering the notch or recess and bearing against the shoulder 9, so that when the frog-lift is tilted into the po sition shown in Fig. 3 the tip of the dagger will also be lifted, in the present embodiment of myinvention, instead of being depressed, as heretofore, the bottom '7 of the notch preventing the dagger from slipping out of engagement. Such elevation of the tip of the dagger rocks the rod d against its spring 5 to depress the arm d, and the upper end of the binder-finger is retracted or drawn away from the binder, and the latter is relieved from pressure due to operation of the protector mechanism, the spring b which is a comparatively-light spring, producing the only pressure which the binder can transmit to the shuttle.

I have shown in Fig. 2 by full lines the position of the dagger, binder-finger, and binder when the loom is running properly and the shuttle S properly in the shuttle-box, which it will be seen is substantially the position of the parts afterengagement of the dagger and frog-lift in accordance with my invention, while the dotted lines show the depression of the tip of the dagger and consequent forcing in of the binder by the binder-finger, as would be effected by the mechanism of usual construction shown in Fig. 4.

, Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In protector mechanism for looms, a shuttle-binder, a dagger operatively connected therewith and movable into operative position when the shuttle is improperly boxed, a sliding frog, and a frog-lift thereon having a shouldered face to be engaged by the dagger, the shoulder being located above the fulcrum of the frog-lift, whereby the point of the dagger will be lifted when the frog-lift is tilted and the pressure upon the binder thereby reduced.

2. In a loom, the protector-rod and its controlling-spring, a dagger and a binder-finger fast thereupon, a shuttle-binder held in engagement with the finger by said spring, a sliding frog, and a frog-lift thereon having a shoulder above itsfulcrum, engagement of the dagger with the frog-lift tilting the latter and raising the point of the dagger, to rock said rod against its spring and thereby retract the finger, relieving the binder from pressure,

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRED A. WHITMORE.

Vitnesses:

T. E. CUNNINGHAM, GEO. OTIS DRAPER. 

